package com.itheima.config;

import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import com.itheima.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**
     * 配置释放静态资源映射器
     */
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("释放静态资源...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展 MVC的消息转换器
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //添加一个消息转换器
        // 给Springmvc添加一个转换器
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
           //设置消息转换器底层对象
            messageConverter.setObjectMapper(new JacksonObjectMapper());
            //将自己的消息转换器放入MVC的消息转换器 ,优先级设置为0;
        converters.add(0,messageConverter);
        // System.out.println("converters = " + converters.toString());
    }
}